Animal Biology
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Animals are:
Multicellular: made up of more than one cell
Heterotrophic: eat other organisms
Use glycogen: store carbohydrate energy as a complex branched sugar
No cell wall: only cell membrane
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Pattern of development
Deuterostome development
Protostome development
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Mouth
Anus
Mouth
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Early development begins
with spiral cleavage
Fate of embryonic cells
determined early
The mesodermal layer
forms as solid mass
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Animal Movement and breathing
Sessile means the animal is attached or rooted to a substrate unable to freely move
o No animal is completely sessile.
Motile means the animal is capable spontaneous movement and moving